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Zorluk: ZorGastroenterology and Hepatology

Match each patient's clinical presentation of chronic diarrhea and malabsorption with the most likely corresponding diagnostic finding or histologic feature.

  • A 45-year-old man presents with chronic diarrhea, a 5-kg (11-lb) weight loss, migratory arthralgias, and recent episodes of memory impairment. Upper endoscopy reveals pale, yellow-white plaques on the duodenal mucosa.Lamina propria infiltration with PAS-positive, diastase-resistant foamy macrophages
  • A 32-year-old woman with type 1 diabetes mellitus presents with chronic diarrhea, fatigue, and an intensely pruritic vesicular rash on her elbows and knees. Laboratory studies reveal a microcytic anemia.Villous blunting, crypt hyperplasia, and increased intraepithelial lymphocytes in the duodenum
  • A 65-year-old woman with a history of rheumatoid arthritis presents with 6 months of chronic, watery, non-bloody diarrhea. Colonoscopy reveals macroscopically normal-appearing colonic mucosa.Subepithelial collagen deposition and increased intraepithelial lymphocytes with preserved crypt architecture
  • A 54-year-old man with systemic sclerosis presents with chronic diarrhea, bloating, and fatigue. Laboratory studies show a macrocytic anemia with normal folate levels. He has a known history of severe esophageal and intestinal dysmotility.Early peak in breath hydrogen and methane concentrations following lactulose ingestion
  • A 28-year-old man who recently returned from a 2-year Peace Corps mission in Southeast Asia presents with chronic diarrhea, fatigue, and glossitis. Laboratory studies show a macrocytic anemia.Blunting of villi and chronic inflammatory infiltrate affecting both the duodenum and terminal ileum

Cevap

The correct pairings identify the hallmarks of Whipple disease (PAS-positive macrophages), celiac disease (duodenal villous blunting and crypt hyperplasia), microscopic colitis (subepithelial collagen with normal macroscopic appearance), small intestinal bacterial overgrowth (early peak on lactulose breath test), and tropical sprue (villous blunting extending to the terminal ileum).
Each vignette provides highly specific clues to synthesize a diagnosis, which must then be mapped to its confirmatory finding. Whipple disease features systemic signs (CNS, joints) and PAS-positive macrophages. Celiac disease presents with autoimmune comorbidities (T1DM, dermatitis herpetiformis) and proximal villous atrophy. Microscopic colitis causes watery diarrhea with a visually normal colon but subepithelial collagen on biopsy. SIBO complicates dysmotility disorders (systemic sclerosis) and is diagnosed by breath testing. Tropical sprue affects travelers to endemic regions, causing pancolonic/ileal involvement and B12/folate deficiency.

Adım Adım Çözüm

1
Analyze the first vignette describing chronic diarrhea, migratory arthralgias, and cognitive changes with duodenal plaques.
Identify the clinical syndrome as Whipple disease.
Multisystem involvement (GI, joints, CNS) combined with duodenal plaques strongly suggests Tropheryma whipplei infection.
2
Evaluate the vignette featuring a patient with type 1 diabetes and a pruritic vesicular rash on extensor surfaces.
Diagnose celiac disease with associated dermatitis herpetiformis.
The strong association between autoimmune conditions (T1DM) and transglutaminase-mediated skin/gut manifestations isolates celiac disease.
3
Assess the older woman with an autoimmune history, chronic watery diarrhea, and a normal colonoscopy.
Recognize the presentation of microscopic colitis.
Secretory diarrhea with a macroscopically normal colon requires biopsy to identify microscopic inflammatory changes.
4
Examine the vignette of the man with systemic sclerosis, intestinal dysmotility, and macrocytic anemia.
Identify small intestinal bacterial overgrowth (SIBO) as the complication.
Dysmotility causes stasis, allowing colonic bacteria to overgrow in the small bowel and consume vitamin B12.
5
Review the presentation of the patient returning from Southeast Asia with glossitis and macrocytic anemia.
Determine tropical sprue as the underlying etiology.
Endemic travel combined with broad small-bowel malabsorption (especially B12/folate) is the hallmark of tropical sprue.
6
Match each clinical diagnosis with its corresponding gold-standard diagnostic or histopathologic finding.
Complete the correct pairings for all five conditions.
Proper diagnosis requires linking the synthesized clinical picture directly to its confirmatory test.

Anahtar Kavram

Pathophysiology and diagnostic findings of chronic malabsorptive and diarrheal syndromes
Tahmini Süre:2m 0s
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Konular

Gastroenterology and Hepatology

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